trigger.h
上传用户:blenddy
上传日期:2007-01-07
资源大小:6495k
文件大小:2k
- /*-------------------------------------------------------------------------
- *
- * trigger.h
- * prototypes for trigger.c.
- *
- *
- *-------------------------------------------------------------------------
- */
- #ifndef TRIGGER_H
- #define TRIGGER_H
- #include "access/tupdesc.h"
- #include "access/htup.h"
- #include "nodes/parsenodes.h"
- #include "nodes/execnodes.h"
- #include "utils/rel.h"
- typedef uint32 TriggerEvent;
- typedef struct TriggerData
- {
- TriggerEvent tg_event;
- Relation tg_relation;
- HeapTuple tg_trigtuple;
- HeapTuple tg_newtuple;
- Trigger *tg_trigger;
- } TriggerData;
- extern DLLIMPORT TriggerData *CurrentTriggerData;
- #define TRIGGER_EVENT_INSERT 0x00000000
- #define TRIGGER_EVENT_DELETE 0x00000001
- #define TRIGGER_EVENT_UPDATE 0x00000002
- #define TRIGGER_EVENT_OPMASK 0x00000003
- #define TRIGGER_EVENT_ROW 0x00000004
- #define TRIGGER_EVENT_BEFORE 0x00000008
- #define TRIGGER_FIRED_BY_INSERT(event)
- (((TriggerEvent) (event) & TRIGGER_EVENT_OPMASK) ==
- TRIGGER_EVENT_INSERT)
- #define TRIGGER_FIRED_BY_DELETE(event)
- (((TriggerEvent) (event) & TRIGGER_EVENT_OPMASK) ==
- TRIGGER_EVENT_DELETE)
- #define TRIGGER_FIRED_BY_UPDATE(event)
- (((TriggerEvent) (event) & TRIGGER_EVENT_OPMASK) ==
- TRIGGER_EVENT_UPDATE)
- #define TRIGGER_FIRED_FOR_ROW(event)
- ((TriggerEvent) (event) & TRIGGER_EVENT_ROW)
- #define TRIGGER_FIRED_FOR_STATEMENT(event)
- (!TRIGGER_FIRED_FOR_ROW (event))
- #define TRIGGER_FIRED_BEFORE(event)
- ((TriggerEvent) (event) & TRIGGER_EVENT_BEFORE)
- #define TRIGGER_FIRED_AFTER(event)
- (!TRIGGER_FIRED_BEFORE (event))
- extern void CreateTrigger(CreateTrigStmt *stmt);
- extern void DropTrigger(DropTrigStmt *stmt);
- extern void RelationRemoveTriggers(Relation rel);
- extern HeapTuple ExecBRInsertTriggers(Relation rel, HeapTuple tuple);
- extern void ExecARInsertTriggers(Relation rel, HeapTuple tuple);
- extern bool ExecBRDeleteTriggers(EState *estate, ItemPointer tupleid);
- extern void ExecARDeleteTriggers(EState *estate, ItemPointer tupleid);
- extern HeapTuple ExecBRUpdateTriggers(EState *estate, ItemPointer tupleid, HeapTuple tuple);
- extern void ExecARUpdateTriggers(EState *estate, ItemPointer tupleid, HeapTuple tuple);
- #endif /* TRIGGER_H */